StuphylinidcB of the Amazon Valley. 121 



punctured, especially in their centres, 7th still more finely 

 and sparingly punctured. Legs black, Avith the tarsi 

 reddish. The basal joint of the front tarsi quite as long as 

 the three following together. 



The male has the hind margin of the 6th ventral seg- 

 ment slightly emarginate in the middle, and the 7th with 

 a triangular notch in the middle. The ^deagus is rather 

 broad and has the ligula flat and broad, similar in length 

 and breadth to the body of the organ, and closely applied 

 thereto. The front feet simple. 



Tun an tins ; one >? . 



Obs. — This species must be closely allied to Staphy linns 

 scenicus, Er., but I have no doubt a comparison Avill prove 

 it distinct therefrom. 



6. Plociopterus Icctus, n. sp. Niger, nitidus, antennis 

 (articulis 7 — 9 fuscis), pedibus, abdomineque rufo-testaceis ; 

 elytris cyaneis, fasciis duabus cinereo-pubescentibus. Long. 

 Corp. 5^ lin. 



Mas : tarsis anticis leviter dilatatis, abdominisque apicis 

 structura complicata insignis. 



Antennffi rather long and slender, yellow, Avith joints 

 7 — 9 darker ; 3rd joint elongate, 4th about as long as 2nd ; 

 from 4 — 10 each is a little shorter than its predecessor; 

 last joint rather long, rounded at the extremity. Parts of 

 the mouth yellow. Head a little broader than the thorax, 

 black and shining, coarsely and irregularly punctured, 

 with the middle part smooth, the punctures behind the 

 labrum extremely large and confluent. Thorax much 

 narrower than the elytra, about as long as broad, dis- 

 tinctly narrowed behind ; the sides a little sinuate, the 

 upper svu'face black and shining, very coarsely and in-egu- 

 larly punctured, a middle longitudinal space impunctate. 

 Scutellum closely and finely punctured, Avith a grey 

 pubescence. Elytra longer than the thorax, blue, Avith tAvo 

 bands of grey pubescence, one at the base the other a little 

 before the extremity, their punctuation moderately fine, 

 not close. Hind body narroAved toAvards the extremity, 

 yelloAv, Avith the 2nd segment pitchy ; segments 3 — 6 finely 

 and rather sparingly punctured. Legs yelloAv, Avith the 

 coxfe pitchy. The anterior tibiae are dilated behind 

 (especially in the male), and furnished jiist below the 

 middle Avith three or four coarse sette placed close to- 

 gether ; thence they are naiTOAved to the extremity. First 

 joint of front tarsus but little longer than the 2nd. 



